1.
The planets orbit the sun in:

3.
A planet sweeps out an area equal to half the total area of its orbit in 180
days. Its orbital period is:

180 days

240 days

360 days

Impossible to tell.

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4.
If the circular orbit of a planet is reduced in radius to 1/8 th of its original
value, its period is now, what
fraction of its old period,
Told
?

1/5Told

1/4Told

1/9Told

1/8Told

5.
Which is the following orbits are possible around the earth:

Various orbits around the earth.

I, II and III

II, III and not I

I and II, but not III

None of these

6.
An eccentricity of zero means the orbit is:

A circle

An ellipse

A hyperbola

A parabola

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7.
An eccentricity of 1.5 means the orbit is:

A circle

An ellipse

A hyperbola

A parabola

8.
If a satellite is orbiting the earth at radius
6×106
meters above the
center of the earth. What is its period? (The mass of the earth is
5.98×1024
kilograms).

2.3×106
secs

9.3×106
secs

7.8×106
secs

4.6×106
secs

9.
Kepler's Second Law is an expression of:

Conservation of energy

Conservation of momentum

Conservation of angular momentum

None of these

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10.
The direction of the force due to gravity between two point objects located at
and
is given by:

-

-

11.
g
equals:

12.
The gravitational force that a spherical shell of mass 102 kilograms exerts on a
5 kilogram mass at its center is:

5.5×102
Newtons

3.74×10-8
Newtons

5.5×10-8
Newtons

0

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13.
If you can throw a ball 10 meters into the air on earth, approximately how high
would you me able to throw it on the moon (mass of the moon is
7.35×1022
kilograms and its radius is
1700
kilometers).

10 meters

60 meters

20 meters

Cannot tell from given information.

14.
A planet of mass
6×1025
kilograms, orbiting the sun (mass
= 1.99×1030
kilograms) has a velocity of 50 kilometers/sec. What is its
rate of change of angular momentum at this point: